Hermann hiesch



(No Model.) 2 ssssssss hee t 1. H. HIRSCH.

- PADDLE WHEEL. No. 247,564.- Patented Sept.27, 1881.

v(N0 Model.)

. 2 Sheets-Sheet 2.- H. HIRSCH. PADDLE WHEEL.

Patented Sept. 27, 1881.

UNITED STATES PATENT OFFICE.

HERMANN HIRSOH, OF 4, 5, AND 6 GREAT SAINT HELENS, COUNTY OF MIDDLESEX, GREAT BRITAIN.

PADDLE-WHEELI SPECIFICATION forming part of Letters Patent No. 247,564, dated September 27,1881.

Application filed May 24, 1881.

(No model.) Patented in England June 19, 1880, in Belgium December 17, 1880. and in France December 18, 1880.

To all whom it may concern Be it known that I, HERMANN HIRSGH, a subject of the Emperor of Germany, residing at 4, 5, and 6 Great Saint Helens', in the county of Middlesex, Kingdom of Great Britain and Ireland, have invented'ne'w and useful Improvemen ts in Paddle-Wheels,(forwhich I have obtained a patent in Great Britain, No. 2,498, bearing date June 19, 1880,) of which the following is a specification.

This is a division of an application for patent filed February 11, 1881, serial No. 25,897, which embraced the same subject-matter.

My invention relates to improvements in the shaping and constructing of paddlewheels; and it consists in giving to such structures alternately-curved lines or und ula ted formations,

such as hereinafter described, and which are designed to afl'ord harmony of contact between the water and the structure therein immersed, to allow the water to be displaced with ease and to diminish friction.

Figure 28 is a group of seven circles. A thick black line'is produced by portionsof the circumferences of any two adjacent circles-as, for instance, S T of the outer six, and of the central one, U. Such line constitutes the germinal curve, which I employ in designing the floats of a paddlewheel according to my invention.

Figs. 29' and 30 show face and edge views,

respectively, of a single float, which may be constructedof any suitable material -as, for

instance, iron or steel-Figs. 31 and 32 showmadeto impinge upon the water in the direction shown by the arrow on Fig. 30.

Fig. 33 is a portion of a side view of a complete paddlewheel furnished with floats according to my invention, Fig. 34 being a View,

at right angles to Fig. 33, of a like fragmentary portion of such complete paddle-wheel.

It will be evident that, although the paddlewheel I have shown by way of illustration is of the radial or fixed-float type, my invention is nevertheless equally applicable to paddle-wheels having feathering floats.

It will be observed that my paddle is curved on both sides and along both edges. This formation gives easy contact between the water and the paddle. Were the curvature but one way the efl'ect would be lost, as in plunging into and passing through the water the beat of the waves is felt at every point.

Having described the nature of my said invention and explained in what manner the same is to be or may be performed orcarried into practical effect, I would have it understood that although I have described and shown the undulated surfaces and edges as being composed of arcs of circles in compliance with the normal diagram shown, yet other curves of approximate contour (including, for example, portions of ellipses) may in some casesjbe adopted for any or all of the constituent elements of such undulated surfaces, (see, for examples, Figs. 34A, 34B, 34C, and 3etD,) according to my invention, the object being, as I have already stated, to afford harmony of contact with the water; also, I would remark that the number of undulations may be varied to suit the circumstancesof particular applicatiouswithout departure from the essential characteristics of my invention, as respects which What I claim as novel and original is as follows:

The paddle-wheel float described, having alternately curved or undulated faces and alter nately curved or undulated edges, substantially as hereinbefore described, and shown in the accompanying drawings.

HERMANN HIRSOH. 

